diff --git a/rust/compiler_test.go b/rust/compiler_test.go
index 58ca52a..b853196 100644
--- a/rust/compiler_test.go
+++ b/rust/compiler_test.go
@@ -43,7 +43,7 @@
 // Test that we reject multiple source files.
 func TestEnforceSingleSourceFile(t *testing.T) {
 
-	singleSrcError := "srcs can only contain one path for a rust file"
+	singleSrcError := "srcs can only contain one path for a rust file and source providers prefixed by \":\""
 
 	// Test libraries
 	testRustError(t, singleSrcError, `